When Windows Defender is on, you will be alerted when spyware and other potentially unwanted software tries to install itself or run on your computer. If you use the default settings, Windows Defender will also check for new definitions (files that are used to determine if software is spyware) and automatically remove any detected item that has a recommended removal action. For more information about Windows Defender, see Using Windows Defender. See Picture bellow
Click to open Windows Defender. see picture bellow
Click Tools, and then click Options. See Picture bellow
Click Administrator, select or clear the Use this program check box, and then click Save. If you are prompted for an administrator password or confirmation, type the password or provide confirmation. See picture bellow
Enjoy it. :D